What’s Happening with SIP and IPv6?

April 6, 2015

At the recent Netnod Spring Meeting Olle E. Johansson from Edvina was invited to talk about his work with dual stacks in SIP. The talk was very personal and covered the progress, or lack of progress, in the IETF and the work done in the SIP Forum IPv6 working group.

The work started when Olle detected strange issues when testing the IPv6 implementation in Asterisk. It wasn’t the code, it was something else. After testing IPv6 at the SIPit events, work started in a working group of the SIP forum that later resulted in documents contributed to the IETF – one issue was adopted by the IETF  SIPcore working group but is not seeing any interest so it doesn’t move forward. In the IETF, strange resistance was met and not much support for doing any changes or additions to the protocols in order to fix proven problems. In fact, quite a surprising opposition was met.

How do you fix issues in an old protocol?

Should it really be this hard to fix issues in a published protocol? Are SIP and HTTP the only protocols that have issues with dual stacks or is it just the two protocols that have been tested in detail?

Further tests at SIPit has not only confirmed the documented issues, but also revealed issues in many implementations that has been supporting IPv6 for a long time.  Source address selection was missing. There’s a lot of work to do before we can get SIP implementations  ready for dual stack use, both in development and in the standards.

The presentation is available on slideshare. We apologise that it is made for live presentation and doesn’t cover all the details on the actual slides, but it may still give some interesting facts.

Learn Kamailio in Barcelona – June 29 – July 3rd

April 4, 2015

Want to learn Kamailio? Register today for the Edvina SIP Masterclass in Sitges near Barcelona this summer! This year, we’re outside of Barcelona in the city of Sitges. 

This is the basic class that go through both SIP and Kamailio – in theory and with many labs. All you need is a laptop with a Linux virtual machine and energy for five days of training with Olle E. Johansson.

This is a unique class where you learn how to build a scalable SIP platforms and how to integrate media servers and PBXs like Asterisk or FreeSwitch into your service.

Olle has many years of experience with both Asterisk and Kamailio. He’s been a developer for over 10 years and have done trainings for a longer time in various topics. He founded the Asterisk trainings, wrote the dCAP and co-founded the Astricon conference. He’s a regular speaker in many conferences around the world, as well as in local geek meetings in Sweden. His SIP Masterclasses have been running for a long time and keep changing based on the development of the protocols and the products involved.

This class is hosted by Avanzada 7 in cooperation with Edvina. Contact us today to book your seat!